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RUM(4) Kernel Interfaces Manual RUM(4) NAME rum -- Ralink Technology/MediaTek USB IEEE 802.11a/b/g wireless network device SYNOPSIS rum* at uhub? port ? DESCRIPTION The rum driver supports USB 2.0 and PCI Express Mini Card wireless adapters based on the Ralink RT2501USB and RT2601USB chipsets. Ralink PCI Express Mini Card adapters show up as normal USB 2.0 devices and are thus handled by the rum driver. The RT2501USB chipset is the second generation of 802.11a/b/g adapters from Ralink. It consists of two integrated chips, an RT2571W MAC/BBP and an RT2528 or RT5226 radio transceiver. The RT2601USB chipset consists of two integrated chips, an RT2671 MAC/BBP and an RT2527 or RT5225 radio transceiver. This chipset uses the MIMO (multiple-input multiple-output) technology with multiple an- tennas to extend the operating range of the adapter and to achieve higher throughput. These are the modes the rum driver can operate in: BSS mode Also known as infrastructure mode, this is used when as- sociating with an access point, through which all traf- fic passes. This mode is the default. IBSS mode Also known as IEEE ad-hoc mode or peer-to-peer mode. This is the standardized method of operating without an access point. Stations associate with a service set. However, actual connections between stations are peer- to-peer. Host AP In this mode the driver acts as an access point (base station) for other cards. monitor mode In this mode the driver is able to receive packets with- out associating with an access point. This disables the internal receive filter and enables the card to capture packets from networks which it wouldn't normally have access to, or to scan for access points. The rum driver can be configured to use Wired Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA-PSK and WPA2-PSK). WPA is the current encryption standard for wireless networks. It is strongly recommended that WEP not be used as the sole mechanism to secure wireless communi- cation, due to serious weaknesses in it. The rum driver relies on the software 802.11 stack for both encryption and decryption of data frames. The rum driver can be configured at runtime with ifconfig(8) or on boot with hostname.if(5). FILES The following firmware file is loaded when an interface is brought up: /etc/firmware/rum-rt2573 HARDWARE The following adapters should work: 3Com Aolynk WUB320g Abocom WUG2700 Airlink101 AWLL5025 ASUS WL-167g ver 2 Atlantis Land A02-UP1-W54 Belkin F5D7050 ver 3 Belkin F5D9050 ver 3 Belkin F5D9050C Buffalo WLI-U2-SG54HG Buffalo WLI-U2-SG54HP Buffalo WLI-U2-G54HP CNet CWD-854 ver F Conceptronic C54RU ver 2 Corega CG-WLUSB2GL Corega CG-WLUSB2GO Corega CG-WLUSB2GPX D-Link DWA-110 D-Link DWA-111 D-Link DWL-G122 rev C1 D-Link WUA-1340 Digitus DN-7003GR Edimax EW-7318Ug Edimax EW-7318USg Edimax EW-7618Ug Gigabyte GN-WB01GS Gigabyte GN-WI05GS Hawking HWUG1 Hawking HWU54DM Hercules HWGUSB2-54-LB Hercules HWGUSB2-54V2-AP LevelOne WNC-0301USB v3 Linksys WUSB200 Linksys WUSB54G rev C Linksys WUSB54GR Planex GW-US54HP Planex GW-US54Mini2 Planex GW-USMM Senao NUB-3701 Sitecom WL-113 ver 2 Sitecom WL-172 Sweex LW053 TP-LINK TL-WN321G EXAMPLES The following example scans for available networks: # ifconfig rum0 scan The following hostname.if(5) example configures rum0 to join network "mynwid", using WPA key "mywpakey", obtaining an IP address using DHCP: nwid mynwid wpakey mywpakey dhcp The following hostname.if(5) example creates a host-based access point on boot: mediaopt hostap nwid mynwid wpakey mywpakey inet 192.168.1.1 255.255.255.0 DIAGNOSTICS rum0: error N, could not read firmware ... For some reason, the driver was unable to read the microcode file from the filesystem. The file might be missing or corrupted. rum0: could not load 8051 microcode An error occurred while attempting to upload the microcode to the onboard 8051 microcontroller unit. rum0: device timeout A frame dispatched to the hardware for transmis- sion did not complete in time. The driver will reset the hardware. This should not happen. SEE ALSO arp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5), hostapd(8), ifconfig(8) HISTORY The rum driver first appeared in OpenBSD 4.0. AUTHORS The rum driver was written by Niall O'Higgins <niallo@openbsd.org> and Damien Bergamini <damien.bergamini@free.fr>. CAVEATS The rum driver supports automatic control of the transmit speed in BSS mode only. Therefore the use of a rum adapter in Host AP mode is dis- couraged. This driver does not support powersave mode. OpenBSD 6.5 March 29, 2019 RUM(4)
NAME | SYNOPSIS | DESCRIPTION | FILES | HARDWARE | EXAMPLES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS | CAVEATS
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